Torque Converter

WARNING: This page is about a different car, the 2013 Infiniti FX50. However, it is still accessible from the selected car via links, so may be relevant.

Check torque converter one-way clutch using a check tool as shown in the figure below.

Insert a check tool into the groove of bearing support built into one-way clutch outer race.
When fixing bearing support with a check tool, rotate one-way clutch spline using a screwdriver.
Make sure that inner race rotates clockwise only. If not, replace torque converter assembly.

Fig 1: Checking Torque Converter One-Way Clutch Using Check Tool
Courtesy of NISSAN NORTH AMERICA, INC.